GTAIII

The damage system was much more complex than the last two games. Pieces of the car could become damaged, loose, and fall off. Smoke indicated a car near the point when its engine catches on fire. The fire would indicate when a car was going to explode. The cars in III era were sensitive, with a small tap causing damage. Damage to nearby cars from an explosion depended on how close a car was to an exploding car.

Boats and planes don't show signs of damage except smoke and fire. Lights could go out if hit into a wall, and doors, bumpers, and frontal quarter panels could fall off, among other things. Dark remnants of cars resulted from an explosion, like in the rest of the III era.

GTAIV

Big improvements over III era. Burning engine or gas tank indicated imminent explosions. Smoke returns. Doors are solid, and can fall off by physical force, such as backing up alongside a wall with the door open.

Hookers-GTAIII

It's not very detailed or anything since I did this quickly, but since some people wanted this, here it is.There were two types of hookers in III. A black and white lady with the same clothes template but different colors. As in future GTAs, they will come into your car if you let them.